Protesters throw stones at a police vehicle in Ubate, north of Bogota, Colombia, Aug. 26, 2013. Hundreds of protesters clashed with police in support of farmers who had being blockading highways for a week for an assortment of demands that include reduced gasoline prices, increased subsidies and the cancellation of free trade agreements.

People launch a 30-meter-diameter paper lantern at Xiapo village, Qionghai, Hainan province, China. The lantern, made of 72 smaller lanterns, was designed for a local ritual ceremony to mark the Chinese Hungry Ghost Festival, also known as Yu Lan, a traditional Chinese festival on the 15th night of the seventh month of the Chinese calendar.

From more than 40 countries and 30 U.S. states, people around the world shared more than 1,400 images of themselves as part of the Wave at Saturn event organized by NASA's Cassini mission. That event on July 19, 2013, marked the day the Cassini spacecraft turned back toward Earth to take our picture as part of a larger mosaic of the Saturn system. The images came via Twitter, Facebook, Flickr, Instagram, Google+ and email. As a tribute to the people of Earth, the mission has assembled this collage from the shared images, using an image of Earth as the base image. (Image credit: NASA/JPL-Caltech)